1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320255f557ff4fe3b43105a4450632e22c4c647fe26b66a8bca2092b1fee8460. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d35f747e-a041-47bd-896e-a74a5a0414d8.json and https://artists.proofprofile.net/proofs/artist/d35f747e-a041-47bd-896e-a74a5a0414d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e48d8d8039214a866506cf96a6f0247f35eb30d87fbd1eb7c1d8927c581dd15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931912412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c6b0fb7e3cd2b496c02fd9f321c4177c129f371f5b7c6da5cd277bc1cf5546. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d44554a33f5fa6b8725c2b900f60188b12a7328d5669d21327abaaaca8dac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07aecdd7c1ac2670dbddd40afb155330a65848fad0f6950116be011b6e28ecb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae9412a0962368953647dafd022228616ad88b07c24ec28d94c77183d29b93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2559a0401699690436b27f59e1e4691739fd41af15475f2088bfc1fb05e7404c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997312055e005a9b53e6f9287d0dc6454a0dd8546803c7addc698990937900c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a41e4f0c2e20a50f2a15cb2e38c20c1d9cff1e36beb14a0354cabe88a6a9346. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b5a7b87ccedb907a30e57e81f5ad4153b0e69881f618115aed9a482dfe5a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2179846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adb962979548380826b1d5d812ef2ea6bfc5bd5d4373c8bda4ba9dfe81a7f5f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2179847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21350aaacbd5268a1f2082a33104d3f3edba17150c372242738964dbec2699. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2179849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f0f5d01d29351f08bdd181eba5ecb7eb196cded76bf1b4e695140cb761d6c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2179851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0642a829d2e0b1a5941df234af8fc412878c106ce91e01cb94270b8c33c7db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F42408478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a7aa99c3dc14fbbb902b3fed62a94f98a7c9a9942fc60755baa60482e9fba4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42437999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2403e3a1cbba629d1c702de1b81f4fb452b20f9429011061f7fd6816600e2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42438000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07aecdd7c1ac2670dbddd40afb155330a65848fad0f6950116be011b6e28ecb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a41e4f0c2e20a50f2a15cb2e38c20c1d9cff1e36beb14a0354cabe88a6a9346. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZUBX2200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0128fe4d9bc015280ee25eb98d4440d82871fcdc2ce5aa81577a47b5696eef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165805f99f3e5d0846998993c81198f220e2c9ec2fbb3461d9e66948054bde41. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49646c188bb24464eee43ca4a706982ed38c5f42c224b09ea78ffdaf03bf9185. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8c58cbb2139f7581a0faa0b5eb86734a12f09581f268aaa6aeddc521c65c4a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf63b0306a2dfe18ba63d7dc5776e74904a3d79ade3888ea832f6e13ff0e931. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32412d6afc839900b2f3da3f1aa3e279f7018e22ca850a4f580dac3815541d62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2260132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472fe7f7cebe62ed2f83d6e0ea151c1f3d103da3a59f6aa2a3692c62416add7e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6F2275672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ab78a1b27b39959d01964a49ebf6280e66ec58d01dbba13b8e30e9f5378079. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2170246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa619dd667dc2bd24d49b579e3f6d37b8d9023b0021dd58a6e1f43b5ead30e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2173205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c47272ae1555090208110f17fdac948e523f388a9e93fa7d9854c187ca5a2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2173206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0fc072266aa8e2cdefb8b9a5f71a90e4423f7d28a73d6bafdfc63fc515d3d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2173209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aae0dfb75d75de455e50909d095a5210964dc58807f6b639afd6ca9b016904. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82010340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a17bb65cdec4ed4ff001dd62fe11fdfafba3549f446a2a669d43553e2b0bb09. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN51914513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a0b85788d5a4f67feae5827baad8c66a0e93569c4c545001aa738b29d34fa2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN51914515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9f2882c15750478408fd948666c6c65376797193b8415249c04b1d677102c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY1918415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf2fd2c775982077ca2d8de6359deb47d25ab65a1f32c25e2f0ba7af6ef267. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU4937395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb64279d0098f39953506305a35c700d670fbca799cca702cce2fb62d4299b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU4937396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f1c4fee19248765ac844e4cc31c115140758874411f1973c7cbf98342b718. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41850022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549defbd4f587d23861473ffe929e41718bd5e63f98195b32bd2c1eee8652dfe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41850023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff596cd2e1210f22f75a064cf77bb355db0d6baf45df4fec586e1bcac249581. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41850025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a85456193947ea7af6649c52713bee32f54ba96d9f0701dbce68be6ee69b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41850026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf9214eddbfb80d88a42607881d3d59666e0f3b7f519b1def63a6e00bc8fada. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES81808450.